Walls that can be more precise, like the normal element brush except be a square ^{[did you know you can use Tab to change brush shape?]}, would be very useful to have in TPT. That means you could make 1 pixel wide walls, which would be useful for tight space electronics , primarily the E-wall and detector. This would be very useful, the uses are self explanatory.
Also 1 new wall called H-wall: heat it like WIFI, and it transfers that exact heat number^{[I'm guessing like as if it had infinite heat capacity?]} to the element it comes in ; contact with, useful for lasers and flaming projects: like bunsen burners or, someting maybe, flamethrowers that have a higher temp than fire but lower than plasma.